Still Can't understand CFrame:ToObjectSpace() CFrame:ToWorldSpace()?

I don’t still understand ToWorldSpace and ToObjectSpace:

But, as now, what I understand, WorldSpace would be like, the workspace, like a Position, and object space, is like the position of the object relative to the position of other… But how will this react while coding? How do I understand it better? :thinking:

For example, if a part is at position:,-122,200)
And I add a part to it, what the part position would be? if I put it up? like this?,1,0) – if I wanted to put a little bit up

Alphabox did a good job explaining this a little while back:


Welp, I still don’t quite understand it :confused:
I don’t understand the parts of CFrame1 and CFrame2